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SashulF [63]
3 years ago
11

A bag has 9 blue marbles, 7 red marbles, 4 green marbles

Mathematics
2 answers:
scoundrel [369]3 years ago
7 0

Answer:

7/25

Step-by-step explanation:

First we need to determine how many total marbles

9blue+7red+4green+5purple = 25 marbles

P(red) = red/total

          = 7/25

Vikentia [17]3 years ago
6 0

Answer:

\frac{7}{25}  \\

Step-by-step explanation:

total number of marbles

= 9+7+4+5 = 25

the probability of randomly

drawing a red marble from the bag

=  \frac{7}{25}  \\

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dimulka [17.4K]

Answer:

99% CI:

-4.637\leq\mu_v-\mu_o\leq 3.737

Step-by-step explanation:

We have to calculate a 99%CI for the difference of means for the vegan and the omnivore.

First, we have to estimate the standard deviation

s_{Md}=\sqrt{\frac{2MSE}{n_h}}

The MSE can be calculated as

MSE=\frac{(SSE_1+SSE_2)}{df} =\frac{(n_1s_1)^2+(n_2*s_2)^2}{n_1+n_2-2}\\\\MSE=\frac{(85*1.05)^2+(96*1.20)^2}{85+96-2}=\frac{7965.56+13272.04}{179} =118.65

The weighted sample size nh can be calculated as

n_h=\frac{2}{1/n_1+1/n_2}=\frac{2}{1/85+1/96}=\frac{2}{0.0222} =90.16

The standard deviation then becomes

s_{Md}=\sqrt{\frac{2MSE}{n_h}}=\sqrt{\frac{2*118.65}{90.16}}=\sqrt{2.632} =1.623

The z-value for a 99% confidence interval is z=2.58.

The difference between means is

\Delta M=M_v-M_o=5.10-5.55=-0.45

Then the confidence interval can be constructed as

\Delta M-z*s_{Md}\leq\mu_v-\mu_o\leq \Delta M+z*s_{Md}\\\\ -0.45-2.58*1.623\leq\mu_v-\mu_o\leq -0.450+2.58*1.623\\\\-0.450-4.187\leq\mu_v-\mu_o\leq-0.450+4.187\\\\-4.637\leq\mu_v-\mu_o\leq 3.737

8 0
3 years ago
Pleaseeeeeeeeeeeee help me!!!!!
Aneli [31]
Answer is 150/x see photo for solution

4 0
3 years ago
6 times some number equals 30
den301095 [7]
Bro the answer to that is 5
4 0
3 years ago
Read 2 more answers
Smart math people want brainliest?
Dmitry [639]

Answer:

2.351 or 2.4

Step-by-step explanation:

8 0
3 years ago
3/8 + 2 1/2 <br><br> pls help!!! make sure to show work. thanks :)
dimaraw [331]

Answer:

2 7/8

Step-by-step explanation:

Let's convert to common denominator

3/8 = 3/8

2 1/2 = 2 4/8

3/8 + 2 4/8 = 2 7/8

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

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